Creatures Creature Soil is a safe proprietary blend of natural materials including Peta Moss Soil Sand and Carbon. Great for a variety of creepy-crawlers as well as natural plant life in habitats. Proprietary blend of natural materials including Peta Moss Soil Sand & Carbon. Ideal for spiders (including tarantulas) insects and other invertebrates. Increases humidity and promotes natural burrowing behaviors. Great for live plants